Laminated container



March 26, 1935. D. c. SHEPARD 1,995,521. I

LAMINATED CONTAINER Filed March 2, 1953 2 Sheets-Sheet 1 David C. Shepard March 26, 1935. D. c. SHEPARD LAMINATED CONTAINER Filed March 2, 1933 2 Sheets-Sheet 2 mica/W34 David C. Shepard 'Patented Mar. 26, 1935 1,995,521 LAMINATED CONTAINER Tamar David 0. Shepard, St. Paul, Minn. Application March 2,1933, Serial N 659,271

10 Claims. '(c1.229-5.5)

My invention relates tolaminated containers and has for its object to provide a container constructed of sheets of material adapted to be secured together to form a combined wall and bottom structure, capable of 'efiectively resisting the stresses to which containers are usually sub jected. N. Another objectof the inventionresides in proe viding a container in which the bottom is secured to the wall structure ofthe container insuch a manner thatthe stresses-to whichthe container is subjected will not cause the. bottom to 'be disengaged or loosened from the wall structure.

An object of the invention resides" in constructing the bottom with a circular body portion adapted toextend across the lower end'of the wall structure of the containerandto form the said body portion from sheets of paper having tongues at the edge of the body portion adapted to be bent upwardly therefrom and to be secured to the inner surface of the wall structure of the container. r A'still further object of the. invention resides in arranging said tongues so that the tips thereof are disposed ata higher. elevation than the body portion of the bottom; 7 a

An object of the invention'resides in constructing the wall structure of sheets of flexible material arranged in laminations withthe lower marginal portions of the laminations-bent back upon and secured to the under side of the body a portion ofthe bottom.

Another object of the invention resides in providing a ring extending about the bottom at the periphery thereof and disposed between the' bottom and wall structure A still further object of the container. of the invention resides in imbedding said ring within the body portion of the bottom. r

An object of the invention resides in constructing the body portion of the bottom of sheets of fiexiblefmaterial and in disposing said ring in between certain of said sheets. I g

A feature of the invention residesin disposing said ring between the outermost sheet of the bot tom and the next to the outermost sheet thereof. An object of the invention resides in constructing the bottom so that the body portion thereof forms a reentrant angle with respect to the wall structure of the container and utilizing a ring of triangular cross-section disposed-within said reentrant angle. A still further object of the invention resides in constructing the wall structure of the container of sheets of flexible material arranged in laminations with the. marginal lower ends of the laminations folded about said ring and secured toone another and to the under surface of said bottom structure.

' Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described; 7 1

In the drawings: v Fig. 1 is a perspective view of a-containerconstructed in accordance ;with my. invention.

"Fig. 2 is'adeveloped view of an unformed bot-- tom illustrating the -manner' of arranging the sheets from which the bottom is constructed and showing the last applied sheet in dotted lines.

Fig., 3- is a diametral sectional view taken through: the bottomstructure and showing the method. of assembling the reinforcing ring and the sheets, formingthe body portion-of the bottom. J

Fig. 4 is a perspective view of the bottom after the same has been formed and prior to the applicationof the wall structure thereto.

Fig. '5 is a sectional detail view taken on line 5,5 f Fig. 1.

In the construction of. laminated containers and particularly paper containers with inset bot-. toms it has heretofore been the custom to form flanges onthe bottom structure depending there-' along the walls of the container and in directly 1 securing the same to the inner surface of the wall structure of the container.

In Fig. 1 Ihave shownacontainer which is" indicated in its entirety at A and which is particularly adapted to be used for shipping butter' andsimilar commodities. This'container comprisesfa wall structure 10 inithe shape of a frusttrum of a cone which is open at its upper end as.

indicated at 11 and which is provided at'its lower end with a bottom12 (Fig. 5). At the upperopen end 11 of the container is provided a hoop 31 which encirclesthe free. end of the Wall struc-- ture 10' and whichjsti ffensi and reinforces the fit.

container at such locality.; A bead 21 disposed at the lower end of the container serves to stiiien and reinforce the same and assists in attaching the wall structure to the bottom of the container. The various parts forming the container A and the method of constructing and assembling the same will now be described in detail.

The bottom 12 is constructed to provide a circular body portion 14, dished as indicated at 20, which body portion is adapted to fit into' the interior of the lowermost end of the wall structure 10 of the container and to close the same and is further constructed with a flange 15' extending up wardly from said body portion. This flange is feathered at the free edge 16 thereof forapurpose to be presently described in detail;

The bottom. 12 is constructed .from a number. of sheets of some suitable fiexible'material '13 such as paper or the like, best shown inFig'. 2."

These sheets areall square inform and are of a width somewhat greater thanthe diameter of the circular body portion 14-. so that-saidsheets provide a band 1'7 which forms a part of'the flange 15 and which is of a thickness-equal to the thickness of all of the sheets of paper.

In assembling the parts of the bottomgglue is.

applied between the sheets '13 and each sheet angularly disposed with respectto the previously applied sheet. This causes the corners la'of the sheets to become distributed throughout the circumference of the bottom structure. By selecting the proper angle of rotation, uniform distri-' bution of the corners'results- Where six sheets are used, the angle between like diagonals of adjacent sheets would "be-fifteen degrees. Due to the fact that'the sheets" of paper are square the corners 18 thereof become spaced from one another at the extrememar'gi'nal portions of'the sheet. Inwardly thereof the said'cornersoverlap each other, the amount of overlap increasing toward the lower periphery and flange so that the portion of the flange where the-same issues from the body portion l l' is of thetsame thickness as said body portion and-feathers to the thicknessiof a single sheet of paper at the free-edge thereof;

For the-purpose of constructingthe'bead 21, a ring 22' is employed which is substantially triangular in cross section-and which is of anexterior diameter such that the same fits snugly within the interior of the wall structure 10 or 'the container. This ring may beconstructedeofimetal,

wood, reed, fibre orany other suitable material and in addition to stifiening and reinfo'rcingthe lowermost edged the container,.forms a core upon which the marginal lower end-of the -.wall.

structure of the container may-be'wrapped when the same are constructed to form the bead 21. In the'iormation of the bottom 12, the sheets are assembledas shown in Fig. 2 with theex cepe tion of thesheet 23 which is -.omitted and. glue applied in between, the various sheets. The, ring 22 is then placed against the next to the last of ,the sheets 13 and the sheet 23 applied-to the outer edge of said ring. The arrangement of the sheets when soapplied is shown in Fig.3 which lillu stratesthe sheet 23 as"jundermost with the ring resting upon the same and the remaining sheets resting upon the ring. "While the sheets '13 and ring22 are so disposed,""the sameare pressed insuitable dies which forms 'the fiange l5 and the body portion licensing the flange to extend upwardly from. the .body portion. Through theshape of. the die the body portion 14 oithe bottom'isiormed dished as shownat Land is constructedwitha roundedweorner 25 ously y applied at the juncture between said body portion 14 and flange 15. Due to the construction ofthe dies the sheet 23 is securely glued to the undermost of the sheets 13 within ring 22 and is also caused to be wrapped. about the ring 22, the corners 25 of said sheet extending upwardly of the ring 22 and being glued to the corresponding corners 18 of to receive the flange l5 and tofit along said flange and into the corners 25 and the dished portion' 20 of the bottom structure. While so disposed the bottom is temporarily held supported against the mandrel through any suitable device which "bears against said bottom structure and ,p'ermits of the-rotation of the mandrel. With the bottom so supported and the flange 15 fitting snugly upon the exterior surface of the mandrel, the wall structure is formed and built upon the mandrel and secured to the "bottom structure. This is accomplished as follows: Sheets of flex ibleimaterial such as paper orthe like indicated at 2'7and segmental in form and of proper curva ture, are glued one upon the other with'extreme marginal portions 28 projecting" outwardly beyond-the'ring 22. As the'various sheets'are applied, the marginal portions 28 thereof are turned back andabout the ring 7 I body portion Moi "the bottom20 or to the previsheet as the case may be. "By means'of this construction, thebead 21 is formed and the same securely attached to the bottom structure. It will readily become apparent that ring 22 is firmly retained between'the bottom 20 and the wallstructure 10. Dueto the formation of the bottom 20 with the curved corner 25 upon the-interior thereof, a curved portion is produced on the exterior of the bottom structure which forms'in conjunction with the wall structure a reentrant angle 29. Ring 22 being-triangular in cross section,-is provided with a portion '30 which fitsinto the reentrant angle 29 and completely fills up the space formed between the bottom and wall structure of the container. When the end portions 28 0f sheets 27 are properly applied, ring 22 is completely enclosed and firmly imbedded-in the structure of the container. 7 Inthe construction of the container the bottom 20 may be first formed and allowed to dry and the wall structure 10 thereafter formed and applied to the body structure as previously described. In'such case when the wallstructure dries, the same contracts and firmly grips the bottom structure making an extremely tight and rigid construction. ,If desired, however, the wall structure 'may be constructed shortly after the formation of the bottom and allparts of thecontainer allowed to dryandcure at the same time. .To .faoilitate. the gluing of the first of the sheets. 2'7 to the flange 15, a liner may be employed which isfi'rst placed upon the mandrel and to which the. corners. 18 of the flange 15 are glued. Glue may then be: applied to this liner and the sheets 27 wrapped aboutthe mandrel and about the previously applied portion ofthe con-- 'tainer and the method proceeded with as previ- 22 and secured to the the construction'thereof.

'Due'to the construction of the bottom 12 with the dished'portion 14 and the bead 21 the container receives support both'at the marginal por flange 15, and several sheets-may also be usedin tion thereof and'at-the center of the bottom. In, this manner the weight contained within thecontainer is more uniformly distributed so that the entire load 'is not entirely carried by the joint between the" bottom and wall structure of the container. At thesame time a construction is formed by means of which the bottom may be readily grasped through engagement with the bead 21 permitting of readily handling the container-when the same is used in the ordinary manner.

" My invention is highly advantageous in that an extremely simple and practical container is provided in which waste of material is reduced'to a minimum and in which strength and rigidity are exceedingly great. With my container it becomes practically impossible to pry apart or loosen'the bottom of the wall structure from the container regardless of the loan carried by the container and the usage given the same. Due to the fact that a bead is used instead of the conventional flange employed in similar containers, a far stronger container is provided and battering down of the flange or marginal portion of the container at the lower edge thereof entirely prevented. "The reinforcing ring constituting the core on which the bead is formed also stilfens and reinforces the entire container structure preventing collapse of the container when roughly handled and preventing the tearing apart of the bottom and wall structure and the distortion or crushing of the rim of the same. Myimproved container can be constructed in an easy and expeditious manner and can be built at an exceedingly low cost with very little waste of material. With my container an absolutely tight joint is formed between the bottom and wall structure so that leakage through the same is entirely prevented.

Changes in the specific form of my invention,

as herein disclosed, may be made within the scope of what is claimed without departing 'from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect byLetters Patent is:

1. In a circular container having a wall structure, a bottom therefor constructed of square sheets secured together and disposed one upon theother and progressively rotated with respect to each other to uniformly distribute thecorners of the sheets about the periphery of the bottom, said sheets being arranged to provide a circular body portion fitting into the lower'end of the-wall structure, the corners of said sheets being turned upwardly from the body portion of the bottom, and secured to the inner surface of the wall' struc: ture.

2. In a circular container having a wall structure formed with laminations, a bottom therefor constructed of square sheets secured together and disposed one'upon the other and progressively rotated with respect to each other to uniformly distribute the corners of the sheets about the periphery of the bottom, said sheets being formed to provide a circular body portion adapted to fit within the lowermost portion of the wall structure, the corners of the sheets of said bottom being bent upwardly and secured to the inner surface of the wall structure of the container, the

marginal lower ends ofthe laminations of the wall structure being'ben't about the under surface of thebottom and secured thereto and to one an- 3. ma circular containerhaving-1a-wall'struc ture, a bottom therefor having a" body :portion adapted to extend across the lower end of. said wall structure, 'aringimbedded within said bottom',the lower endof fsaidwallstructure extendmg about said ring "and .beingxsecured to the under surfaceof the tom. r

4. In a circular container having a wall structure formed with laminations, a bottom therefor comprising a body portion adapted to'extend across the lower end of said wall structure,

body portion of -said.bot-.

a'ring imbedded in the body portion of said bottom, the marginallower ends or the lamina.- tions of the wall structure being bent about the ring and secured to the under surface of said bottom. a V

5. In a circular container having a Wall structure, a bottomntherefor constructed of sheets secured together and disposed one upon the other to provide a body portion adapted to extend across the lower'end of the wall structure,

and a ring imbedded in said body portion and disposed between certain of the'sheetsthereof;

other to provide a body portion adapted to ex-;

-tend across the lower end of, the wall structure,

said sheets being constructed with tongues extending upwardly from the body portion of the wall structure at the margin thereof, a ring mounted upon said body portion and extending about the same at'th'e marginalportion theretothe lowermost .of the first-named sheets and enveloping said ring, said last-named sheet'having tongues isof and another sheet-secured suing upwardly from said ring and secured to some of the tongues of the other of the'sheets,

said tongues being secured to said wall structure.

8. In a circular'container having a wall structure, a bottom'therefor constructed of sheets secured together. and disposed one uponthe other to provide a body portion adapted to extend across the lower end of said wall structure,said

sheetsbeing provided at the edge of said body portion with tongues adapted to be bentup wardly from the body portion and to be secured.

to said wall structure, said bottom and wall structure forming an angular groove and a ring of augular cross-section disposed f within said groove of said container and filling the same.

9. In a'circular container having a wall structure, a bottom therefor constructed of sheetsgsecured together and disposed one upon the other to provide a body. portion adapted to extend' across thelower end of said wall structure, said sheet-s being provided at the edge of said body portion with tongues adapted to be bent upwardly from the body portion andto be secured to said wall structure, said'bottom forming a reventrant angle with respect to said wall structure and a ring of triangular cross-section disposed within said reentrant angle of said container, the

4 v lowermost petition :of said -wal1.struc+ ture extending about safid im'd being secured to the under surface of said bottom.

10.Inta circu1arcontainer:ha gza, waned-tic ture formed with :laminations, a, bottom-therefor constructed of sheets 'secured together :and disposed one upon the other to :provideabody portion adapted to extend across the lower end of the wall structure, said sheets being iformed H) with tongues at the edges oi? the body :portion adapted to bent upwardly 'vtherefrom and secured to the inner suriacesof the walhstructure, said-bottom forming in conjunction, with said wall fStIHCtUI'EB. reentrant angle, a ring of triangular cross section disposed within said reentrant' anglegthe marginal lower ends :of the laminations of the. wall structure being bent aboutsaidring :and secured to the under su'gfaee 0f :the body zpOlbiOn; ?Of the :bottom.

Am C. SHEPARDQ 1O 

